The last of a dying breed.

Currently watching.
Butch Cassidy: How long you figure we've been watching?
Sundance Kid: Oh, a while.
Butch Cassidy: How long before you figure they're not after us?
Sundance Kid: A while longer.
Butch Cassidy: How come you're so talkative?
Sundance Kid: Just naturally blabby, I guess.
Butch Cassidy and the Sundance Kid in 5 Seconds
As onefootinthegrave put it, they are the original bromance
Butch Cassidy